Overview A Study to Evaluate the Safety and Efficacy of ASP015K in Moderate to Severe Rheumatoid Arthritis Status: Completed Trial end date: 2013-12-02 Target enrollment: Participant gender: Summary The purpose of this study is to evaluate the safety and efficacy of ASP015K in moderate to severe rheumatoid arthritis (RA) subjects Phase: Phase 2 Details Lead Sponsor: Astellas Pharma Global Development, Inc.Treatments: Peficitinib